Electric lamp



(N0 Model.)

2 Sheets-Sheet 1. J. H. GUEST.

ELECTRIC LAMP.

Patented Oct. 3, 1882.

j mmfoz 2 Sheets-Sheet 2.

(No Model.)

J. H. GUEST.

ELECTRIC LAMP.

Patented Oct. 3, 1882 N. PETERS. Phnhrlnhognphcr. Waihinglfllb n. c

UNITED STATES PATENT OFFICE.

JOHN II. GUEST, OF BROOKLYN, NElV YORK.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 265,315, dated October 3, 1882.

Application filed November 522, 1880. (No model.)

' specification.

Electric lamps have been made of various Y kinds of carbon in the form ofa horseshoe; but

the material to be carbonized.

difficulty has arisen in connecting the wires permanently to the carbon.

My present invention is madefor the purpose of connecting the metallic conductors to the ends of the substance to be carbonized before the carbonization takes place, so that the contact of the metal and the carbon may be of the most intimate character, and the metal connections are adapted to be united with the wires that conduct the electricity after such wires have been passed through the glass bulb and hermetically sealed therein.

In the drawings, Figure 1 represents the lamp complete. Fig. 2 shows a section of the mechanism for inserting the conductors into Fig. 3 is an elevation of the same. Fig. 4 is the carbon arc detached. Fig. 5 is a section of the lamp with the suspending device entirely above the bulb. Fig. 6 is a section of the hooks in a slightly different form.

My present invention is especially adapted to carbons made from vegetable ivory or equivalent substance. The material is cut out in the desired form, but the ends are left comparatively thick and heavy. In Fig. 2 part of such a blank is shown at a with the heavy ends I). These ends I) are perforated transversely and a wedge of platina or equivalent metal inserted through the hole and pressed firmly to its place, in order that the wedge may fill the hole tightly and'slightly compress the vegetable ivory against which it is in contact; but the wedge must not be driven in so far as to split the material.

A convenient means for inserting these wedges is to clamp the wire portion 0, that projects from the small end of the wedge e, (and for this purpose the clip-plates d (I may be used.) The vegetable ivory rests upon the nut k at the end of the tubular stock I, and by screwing the nut along upon said tubular stock lthe thick portion of the vegetable ivory is pressed along upon the wedge and the parts firmly brought into contact. After the wedges 0 have been introduced into the vegetable ivory or similar material the wires 0 are to be bent up into the form of loops or hooks at 0. Sometimes the platina wire will be more or less flattened, as in Fig. 6, and the loops t' of the conducting-wires 7c are adapted to receive the hooks or loops 0. The surplus materials at the ends of the arch of vegetable ivory are removed and the arch dried and carbonized, and it is then ready to be inserted into the glass bulb tand connected to the wires k by the portions 0 being hooked into the eyes or loops at the ends of the wires 7a.

In the manufacture of the glass bulb t the cups m, for mercury or other suitable sealing materials, are applied at the top of the bulb, and the wires L pass through the glass at this place, and the glass is melted around the same. The mercury or other sealing substance is introduced into the cups and acts in the manner set forth in my Patent No. 225,594. The bulb is left open at the bottom end until the carbon has been inserted and connected to the wires It, after which the glass is softened by heat, contracted, and connected to a tube leading to the apparatus that exhausts the air. After the vacuum is produced the lamp is sealed by application of heat to the connecting-tube.

The lamp is suspended, and the device for suspending thesame consists ot'aspoolor band, 0, of non-conducting materialsuch as hard rubber--aroui.id the upper part of the bulb and secured by plaster-of-paris or otherwise so as to be a permanent fixture, and upon this band 0 there are two plates, 10 w, to which the wires are soldered, and at this band 12 the lamp is affixed into a suspending-bracket, and the conducting-wires are brought into contact and clamped against the plates 20 w, sothat the current passes freely and the lamp is complete in itself, and may be removed from or replaced in the supporting-bracket.

In Fig. l I have shown the hooks c and wires 79 sufficiently heavy to receive and support the small weights at; 00, that serve to keep the carbon in a vertical hanging position, and to insure contact between the metallic conductors at the loop or hooks. By this means the carbon is free to swing; but the conductors cannot become detached, and the carbon will not he lia- 2. In an electric lamp,the combination, with ble to become injured either in handling the thecarbonand the metallicconductors thereof, lamp or in consequence of the action of theofsuspendingloops or hooksa-nd Weights upon electric current. the metallic conductors, substantially as and r5 5 I claim as my inventionfor the purposes set forth.

1. The combination, with a blank of vege- Signed by me this 18th day of November, table ivory or similar material, of a metallic A. D. 1880.

wedge-such as platinapassing through a J. H. GUEST. hole near each end ofsaid blank and adapted to \Vitnesses 10 be connected with the wires of the electric cir- (H30. '1. PINCKNEY, cuit, substantially as set forth. WILLIAM G. MOTT. 

